Pump



FIG. 1 is a top perspective view of a pump showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an opposite side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevational view thereof; and

FIG. 7 is a rear elevational view thereof.

An ornamental design for a pump, as shown and described.